c21pr.com

Valid Email Server
Domain Lookup › c21pr.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
c21pr.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-21 01:52:27 UTC · ↺ Refresh

MX Hostnames

  • c21pr-com.mail.protection.outlook.com

MX Priorities

  • c21pr-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 107.180.4.81 ↩ 81.4.180.107.host.secureserver.net

Mail Server IPs

  • 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
  • 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
  • 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
  • 52.101.50.4 ↩ mail-co1pr03cu00404.inbound.protection.outlook.com
  • 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com

SOA Record

Raw SOA ns17.domaincontrol.com dns.jomax.net 2025061100 28800 7200 604800 600
Primary NS (mname)
ns17.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2025061100
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns18.domaincontrol.com
ns17.domaincontrol.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:icprobounce.com include:_spf.e2ma.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

6 records
  • sipfed.online.lync.com
  • @=numc0mj8qnncpv4upbeon610il
  • numc0mj8qnncpv4upbeon610il
  • {@}={numc0mj8qnncpv4upbeon610il}
  • SPFv=spf1 include:spf.protection.outlook.com include:icprobounce.com include:_spf.e2ma.net -all
  • e2ma-verification=pmueb
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